Wickless oil burner



C. A. STOCKSTROM.

WICKLESS OIL BURNER.

APPLICAIIONYFILED SEPT. 30, 1921.

QW n m m o llllluw" Patented (lot. 3, I922.

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CHARLES A. STOCKSTROM, OF ST. LOUIS. MISSOURI, ASSIGNOR '10 AMERICAN STOVE GOMIPANY, OF ST. LOUIS, MISSUURI A CORPORATION OF NEW JERSEY.

WICKLESS OIL BURNER.

Application filed September 30, 1921. Serial No. 504,370;

To all whom it may concern:

Be it known that I, CHARLES A. S'rooK- STROM, citizen of the United States, residing at St. Louis, State of Missouri, have invented certain new and usfeul Improvements in l fickless Oil Burners, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to improvements in wickless oil burners and pertains particularly to the wickless blue flame oil burners.

A wickless blue flame oil burner comprises essentially an oil receiving and containing trough, a lighting member therein, a combustion section mounted above the trough comprising parallel perforated tubes, and means for controlling the flow of oil to and from the trough, all of which is well understood by those skilled in the art.

In the commercial wiclrless oil burners known to me the flow of oil to the trough has been controlled in two ways, viz:

l. A needle valve between the oil supply and the trough for controlling the flow of the oil from the supply to the trough. In this type of control the oil supply may or may not have the well known maintained oil level in respect to the trough.

2. By providing a maintained oil level supply for the trough and moving the trough or the maintained oil level vertically for causing the oil to flow into and out of the trough.

It is desirable that the flame should promptly go out after the oil supply is cut off from the trough.

In the needle valve control construction now in use, when the valve is closed the flame will not go out until all of the oil in the bowl and the contained oil in the wick has been consumed, which requires several minutes time. This is objectionable in practice because it requires that the operator wait until the flame is burned out or leave the burner with the flame continuing therein which is inadvisable to do.

In the oil supply control in commercial use where the trough moves vertically in re s acct to the maintained oil level for controlling the flame and for extinguishing the burner, it is necessary to use a telescoping supply pipe with a stuffing box which is very liable to leak and therefore objectionable.

The primary object of my invention is to provide a construction in which the oil is immediately withdrawn from the trough Fig. 2 is a vertical central section of a wickless oil burner with my improvement applied thereto, showing the maintained oil level in respect to the bowl, and my improvement when the burner is in operation.

Fig. 3 is a view similar to Fig. 2 showing my improvement in position for extinguishing the burner, and showing the oil level below the bottom of the trough.

Fig. 4 is a vertical sectional view showing a modified form of valve used in my improvement.

Referring now to the accompanying drawings in which similar reference characters refer to the same parts, 1 is any desired form of frame, in which is suitably supported a main oil supply pipe 2 which has one end 3 extending outside of the frame and carrying a well known form of maintained oil level supply 4:. This maintained oil level supply 4 may be of any of the well known forms andsince it is well understood by those skilled in the art no further description is necessary. i

In carrying out my improvement any desired specific form of wiclrless oil burner trough may be utilized, that is to say, either the shallow or deep type, without departing from the spirit and scope of my invention: In disclosing one mechanical expression of my improvement, I show the deep form of oil trough 5, and located in this trough is the usual or any desired form of lighting ring 6. Removably supported above the trough is the usual form of combustion section 7, consisting of the usual inner and outer perforated tubes 8, and 9, and the usual surroundinghood 10.

The bottom of the trough 5 is placed in communication with the oil supply tube 2 through the meansof an oil conduit and my present improvement is embodied within this conduit. As here shown the conduit comprises a tube 11 having its upper end 12 connected to and communicating with the bottom of the trough and its lower end 13 communicating with the lower end of a chamber 141. Located below the chamber 14. is a second chamber 15, the two chambers being separated by a horizontal wall 16 which forms the bottom of the chamber 141 and the top of the chamber 15. A suitable pipe or conduit 17 establishes oil communication between the oil supply pipe 2 and the lower chamber 15.

The wall or bottom 16 of the chamber 14 is provided with a valve receiving opening 18 with which a valve 19 co-operatcs for the purpose of permitting the tlew of oil through the opening 18 and for cutting oil the flow of oil through the said opening. A. suitable spiral expanding spring 20 is lo cated between the valve 19 and the screw plug 21, which forms abottom' for the chamber 15 and it has an opening to receive the valve stem 22 for the purpose of guiding and supporting the valve in its up and down movement.

The chamber 14; extends above andbelow the maintained constant oil level and the cubic capacity of the chamber 14, both above and below the maintained oil level is at least equal to and preferably greater than the cubic capacity of the rough below the oil level. The object and purpose of this Clltlllb ber 14 will presently appear.

Located within the chamber 14 and movable up and down in the chamber is a plunger or displacement member 23. A member 2 1 projects upward from the plunger 23 and loosely passes through the top 25 of the chamber 14, by means of which the plunger is moved up and down. Any suitable means may be used for moving the plunger, so far as my present improvement is concerned. but the form here shown comprises the said rod 24. and this red is of the tooth or gear form to engage a pinion 26 on an oscillating shaft 27. This shaft is journaled in suitable ears 28 which extend upward from the wall of the chamber 1 1 and carries at one end hand operating wheel 29. would be of such a size that when the shaft 27 is oscillated throughout, approximately a half a rotation, the plunger will be moved substantially from top to bottom of the cham ber 14;. When the plunger 23 is at its downward position shown in Fig. 2, it strikes the projection 30 on the valve 19 depressing the valve to permit oil to flow through the opening 18 into the chamber 14 and through the pipe 11 to the trough 5.

The operation of my improvement is as follows With the parts in the position shown in Fig. 2, oil flows from the supply 1 through the supply tube 2, the conduit 17 and into the low chamber 15. From this chamber it 'tion shown in Fig. 3.

The pinion 26.

flows through the opening 18 into the chamber 14: and through the pipe 11 to the trough 5. lVith the parts in the position shown in this figure, the oil rises in the trough to the oil level A, which is the maximum depth of the oil in the trough 5 for full operation of the burner. If it is desired to lower the flame in the construction shown in Figures 2 and 3, the shaft 27 is turned so as to slightly lift the plunger 23 and cause the valve 19 to close sufiiciently to permit only sufficient oil to flow through the valve opening 18 to maintain the oil in the trough 5 at the proper low level for the desired flame; hen it is desired to extinguish the burner, whether it be operating with a high flame or relatively low flame, the plunger 23 elevated in the chamber 1--; to substantially the posi- Before the plunger23 has reached the oil level A. the valve 19 has closed the opening 18 and entirely cut off further flow of oil from the supply. With the plunger 23 in its upward position shown in Fig. 3 the oil quickly flows from the trough into the chamber 14; and since this chamber below the oil level A and the plunger 23 have greater cubic capacity than the trough below the oil level A, the oil is instantly withdrawn from the trough into the lower end of the chamber 1 1 so that no oil remains in the trough to be consumed and the burner is soon extinguished since onl the oil in the lighting ring remains to be consumed. By this construction the disadvantages of the methods of extinguishing wickless blue flame burners heretofore explained are obviated by a very simple and reliable construction.

For the purpose of indicating to the operator when the parts are in position for burning and to be extinguished, I provide suitable dial 31 supported from the upper end of the wall of the chamber 14 and the shaft 27 with a pointer 32. This dial 31 may he e any desired markings on it. As here shown it has Cipen, which means that the burner is on full, and Closed which means that the parts are in position for extinguishing the burner or that the burner is out. Of course, there may be intermediate markings if desired for the purpose of indicating medium and low flame, etc.

In Fig. 4- is shown a slight modification in that the valve 19 is not spring actuated but has its stem 22 provided with screw threads 33 and its outer end with a finger operating wheel 34, whereby the valve can be adjusted with nicety with respect to its opening 18 for regulating the flow of oil to the trough 5. instead of the spring and automatic action disclosed in Fig. 2. ln the form shown in Fig. 4, it will be necessary to first close the valve and then afterwards lift the plunger 23.

Cir

lVhen the plunger 23 is in the elevated position shown in Fig. 8, the oil quickly flows into the chamber la and since the cubic capacity of the chamber 14: below the oil level A and the cubic capacity of the plunger is greater than the cubic capacity of the trough 5 below the oil level A, the oil falls to the level B, Fig. 3, which is below the bottom of the trough, so that only the oil contained in the lighting member 6 remains to be consumed and the burner promptly goes out.

While I have referred to the member 23 as a plunger, it appears to be generically a displacement member.

It will be readily understood that those skilled in. the art could make variations and changes in the construction here shown for carrying out my improvement without de parting from the spirit and scope of my invention and the protection sought by the appended claims.

Having thus described my invention, what I desire to claim by Letters Patent is: i

l. The combination with the trough of a wickless oil burner, of an oil supply for the trough, a chamber communicating with the supply having a valve in its bottom, and a movable displacement means in said chamber for the purpose described.

2. The combination with the trough of a wickless oil burner, of a maintained level oil supply communicating with the trough, a chamber communicating with the supply having a valve in its bottom, and a movable displacement means in said chamber for the purpose described.

3. The combination with the trough of a wickless oil burner, of an oil supply communicating with the trough, means for controlling the flow of oil supply to the trough, a chamber located between the controlling means and the trough, the chamber having an upwardly closing valve in its bottom and in communication with the trough, and a displacement means within the chamber for the purpose described.

l. The combination with the trough of a wickless oil burner, of an oil supplycommunicating with the trough, means for controlling the oil supply, to the trough, a chamber in communication with the trough, a downwardly opening valve in the bottom of the chamber, and a displacement means within the chamber opening the valve when lowered for the purpose described.

5. The combination with the trough of a wickless oil burner, of an oil supply conduit communicating with the trough, a chamber included in said conduit, the bottom of the chamber having a valve controlled opening, a displacement member movable in the chamber for causing the oil to flow from the trough to the chamber, and means for operating the valve.

6. The combination with the trough of a wickless oil burner, of an oil supply conduit communicating with the trough, said conduit including a vertically arranged chamber located below the trough, the bottom of the chamber having a valve controlled opening, a displacement member vertically movable in the chamber and adapted to open the valve when in its downward position and close the valve when moved upward, the parts operating for the purpose described.

7. The combination with the trough oi a wickless oil burner, of an oil supply conduit including a chamber located below the bottom of the trough, the bottom of the chamber having a valve controlled opening, means for controlling the valve, and a plunger vertically movable in the chamber tor the purpose described.

8. The combination with the trough of a wickless oil burner, of an oil supply conduit including a chamber located below the bottom of the trough, the chamber having a bottom and communicating with the trough at a point above its bottonnthe bottom having a valve, and a displacement member within the chamber.

9. The combination with the trough of a wickless oil burner, of an oil supply conduit including therein a chamber having a bottom located below the trough, a communication between the trough and the chamber above its bottom, a displacement member within the chamber, means for moving the displacement member vertically, the bottom of the chamber having a vertically movable spring actuated upwardly closing valve, the displacement member adapted when it is lowered to open the valve.

10. The combination with the trough of a wickless oil burner, of an oil supply conduit communicating with the trough, means for maintaining a constant oil supply level for the trough,"a vertically arranged cham ber communicating with the conduit and eX- tending above and below the maintained oil level, the chamber having a cubic capacity below the oil level greater than the cubic capacity of the trough below the oil level, and a plunger vertically movable in the chamber above and below the oil level, the plunger having a cubic capacity substantially greater than the cubic capacity ofthe trough below the oil level, the parts combined for the purpose described.

Tn testimony whereof I hereunto aihx my signature.

CHARLES A. STQCKSTROM. 

